View Compilation Error

0_0_34254821_12970\Main.java:1: 错误: 需要class, interface或enum
    public static void main(String[] args) {
                  ^
0_0_34254821_12970\Main.java:3: 错误: 需要class, interface或enum
        while (scanner.hasNext()){
        ^
0_0_34254821_12970\Main.java:5: 错误: 需要class, interface或enum
            int b = scanner.nextInt();
            ^
0_0_34254821_12970\Main.java:6: 错误: 需要class, interface或enum
            System.out.println(a+b);
            ^
0_0_34254821_12970\Main.java:7: 错误: 需要class, interface或enum
        }
        ^
5 个错误